305272 D

Double row angular contact ball bearing with two-piece inner ring and relubrication feature

Double row angular contact ball bearing, with two-piece inner ring and relubrication feature, correspond to a pair of single row angular contact ball bearings in a back-to-back arrangement.

The two-piece inner ring enables incorporation of more balls, resulting in higher load carrying capacity. The annular lubrication groove and holes in the outer ring facilitates relubrication.

  • Accommodate very high axial loads in both directions, radial loads, and tilting moments
  • Relubrication feature
  • Suitable where a stiff bearing arrangement is required
  • Require less axial space than equivalent pair of single row angular contact ball bearings

Dimensions

d
220 mm
 Bore diameter
D
309.5 mm
 Outside diameter
B
76 mm
 Width
d1
≈252.5 mm
 Shoulder diameter inner ring for two-piece inner ring
D1
≈286 mm
 Shoulder diameter outer ring
b
13.9 mm
 Width annular lubrication groove at outer ring
K
7.5 mm
 Diameter lubrication hole (outer ring)
r1,2
min.2.1 mm
 Chamfer dimension inner ring for two-piece inner ring
a
204 mm
 Distance pressure point(s)

Calculation data

Basic dynamic load rating C
312 kN
Basic static load rating C0
520 kN
Fatigue load limit Pu
13.4 kN
Reference speed
2 000 r/min
Limiting speed
2 000 r/min
Calculation factor kr
0.095
Limiting value e
0.86
Calculation factor X
0.62
Calculation factor Y0
0.63
Calculation factor Y1
0.73
Calculation factor Y2
1.17
Add to Enquiry
SKU: 305272 D-SKF Categories: , , ,
SKF

Description

Properties

Contact angle: 32 °

Contact type Normal contact (two-point contact)
Number of rows 2
Locating feature, bearing outer ring None
Ring type Two-piece inner ring and one-piece outer ring
Cage Machined metal
Arrangement of contact angle (double-row bearing) Back-to-back (O)
Matched arrangement No
Universal matching bearing No
Axial internal clearance NSTD
Material, bearing Bearing steel
Coating Without
Sealing Without
Lubricant None
Relubrication feature With

(220X309.5X76) (305272D) (305272-D)

Additional information

Weight 17.7 kg
Size (mm)

Colour

Related products